class DownTop extends Object {
	
}

public class DownTopMain {
	public static void main(String[] args) {
		DownTop d = new DownTop();
		Object obj = d;
		System.out.println("Object obj => "+obj);
		DownTop t = (DownTop)obj;
		System.out.println("DownTop t => "+t);
	}
}
